Pivoted hoist with adjustably supported arm



Sept. 5, 1950 J. HAUK 2,521,216

PIVOTED HOIST WITH ADJUSTABLY SUPPORTED ARM Filed May 25, 1948 PatentedSept. 5, 1950 PIVOTED HOIST WITH ADJ USTABLY SUPPORTED ARM Joseph Hank,Waukesha, Wis., assigner to Allis- Chalmers Manufacturing Company,Milwaukee, Wis., a corporation of Delaware Application May 25, 1948,Serial No. 29,145

6 Claims.

This invention relates in general to a hoisting device and moreparticularly to a hoist which may be adapted vfor operating a device forfiling the slots of a cylindrical laminated core.

In the use of other known hoist devices, there exists a dificulty inadjusting the hoist for quickly aligning its cable with a slot of thecore and in readjusting the hoist for quickly aligning the cable withanother slot of the core.

To reduce the time necessary for adjusting a device of the typeconsidered, it is advantageous to use a hoist which may be mounted onthe end of a core and which provides means for adjusting the radialpositie-n and the angular position of the cable support.

It is therefore an object of the invention to provide suitable powermeans such as a hoist for operating a device for filing the slots of acylindrical laminated core.

Another object is to provide a pivoted hoist which is supported at apoint adjacent the cable pulley and at another point.

Another object is to provide a pivoted hoist in which the cable pulleyand a support may be adjusted radially independently of each other.

Another object is to provide a pivoted hoist which may be adjustedradially for supporting the hoist on the frames of cores of differentdiameters.

Other objects and advantages will be apparent from a consideration ofthe following description taken in consideration with the accompanyingdrawing, in which:

Fig. 1 is a View in elevation of a pivoted hoist built in accordancewith the present invention and shown mounted on an end of a cylindricallaminated core, each having parts thereof broken away;

Fig. 2 is a top View of the hoist shown in Fig. 1, with additional partsthereof broken away; and

Fig. 3 is a stepped, cross sectional view of the hoist shown in Fig. 1,taken along the line III-III.

Referring more particularly to the drawing by characters of reference,numeral 4 generally designates a cylindrical laminated core, such as thecore of a dynamoelectric machine. The core is assembled in a statorframe 5 on which the hoist may be mounted through uprights 6 bolted orclamped firmly to the frame.

Horizontal beams I of the hoist span the core along opposite radii andare fastened to the uprights E by suitable means such as bolts 8 whichmay be loosened for centering the hoist on the core.

An annular pivot plate 9 having longitudinal ribs I Il is rigidlymounted on the beams 'I by bolts II fastening the ribs to the beams. Theinner part of pivot plate 9 forms a hub I2 containing a bushing I3 for ashaft I4.

The shaft I4 is keyed at its upper end to a worm wheel I5 having a hubIB. The worm wheel is held in place on the shaft by a pair of shaftcollars I 'I fixed to the shaft by pins I8 on each side of the hub I6.The lower shaft collar Il is seated on the bushing I3 and the hub I2 ofplate 9 for supporting the shaft I4.

The worm Wheel I5 is operatively connected to a worm I9 Xed to a shaft2G which is supported in bearings 2| mounted on beams l. Fastened ateach end of shaft 20 for rotating the worm I9 is a handwheel 22.

A table 24 is welded tothe lower portion of shaft I4. The bottom surface25 of pivot plate 9 contacts part of the upper surface 26 of the table.The table extends beyond pivot plate 9 in a generally diametricaldirection. Its lower portion is machined to form ribs 2l to which areattached rails 28. The ribs 2l, the rails 28, and the undersurface oftable 24 denne a slide bed. A slide member 30 having machined grooves 3iis inserted in the bed with the rails 28 tting into the grooves 3i forslidably supporting the slide member. The slide and the table cooperateto dene a channel 32. Contained in channel 32 and rigidly attached tothe slide 3E]l is a nut 33. A screw 34 extending longitudinally of thetable in channel 32 is tted in nut 33. The screw is pivotally supportedin the ends of the table, and is secured against longitudinal movementin the table by collars 35 and pins 3B fastened to the ends of the screw34 at each end of the table.

At one end of the table a handwheel 38 is mounted for turning a set ofgears 39. One of the gears 39 is xed to an end of the screw 34 forturning the screw.

The slide is provided for adjusting the radial position of at least theguiding pulley of the winch used for drawing a ling device through theslots of core 4. In the embodiment shown in Fig. 1, to the slide 33 areattached, as by welding, a pair of plates 4@ forming an essential partof the framework of a winch 4I of any known construction. The winch maycomprise a threaded drum 42, a cable 43 connected thereto, and a motor44 of any suitable known type for rotating the drum 42. The winch may beprovided with any suitable known control mechanism such as a clutch 45,for operatively connecting the motor to the drum, and with a brake 43for retarding movement of the drum. The motor 44 is shown as an airoperated motor driven by compressed air supplied from a suitable source(not shown) through a hose 41.

Pivotally supported in the frame formed by the plates 40 is a pulley 49on which the cable 43 may be guided. The winch frame supports an arm 50comprising a pair of channel irons 5I each slidably mounted between apair of L- shaped rails 52 welded to the plates 40. outer ends of thechannel irons are connected together by a cross member 54 for retainingeach channel iron between its pair of L-shaped rails.

For adjusting the radial position of arm 50, channel irons l areconnected to the plates 40 by a pair of screws 55. Each screw may belocked by a pair of lock nuts 51 to a flange 58 welded to the plates. Apair of lugs 59, rigidly attached to channel irons 5l, are tapped andthreaded for receiving screws 56. Nuts 6E! may lock the screws 56 to thelugs 59.

For additionally supporting the winch 4l, an adjustable leg 52comprising a screw 63 is connected to the arm 50 through cross member54. The screw of leg 52 may have a pivot foot 64, which is shown restingon an end surface of the frame 5. The leg 62 may also be provided with ahandwheel 65 for turning the screw 63.

The preferred embodiment of the hoist herein described is shown mountedon a frame 5 of a stator of a dynamoelectric machine, and the cable 43is shown connected to a filing device 65 shown positioned in one of theslots 61 disposed about the bore of the cylindrical laminated core 4. Inthe following description it will be assumed that the axis oi" core 4 isvertical, but it will be understood that the hoist may also be used inconnection with a core having a horizontal or inclined axis.

To use the hoist for operating the filing device as shown, the uprights6 are mounted on frame 5 on opposite radii. Beams 1 are rested onuprights S in proper position bringing the axis of shaft i4 incoincidence with the axis of core 4. The beams then are fastened to theuprights by means of bolts 8. The bolts allow a predetermined range ofadjustment of the distance between uprights 6 to permit mounting thehoist on frames of different diameters.

After beams 1 are thus positioned, the hoist is adjusted to bring cable43 in one of the slots of the core. Handwheel 38 is rotated, causingscrew 34 to turn in nut 33. The nut 33, unable to turn with the screw,travels along the screw and moves the slide 35 in the bed of table 24.

Since the slide is welded to plates 4c, turning r handwheel 38 causeswinch 4|, including pulley 49, and the arm 50 with its leg E2, to bemoved radially with respect to the table 24 and to the core. Handwheel33 is rotated until cable 43 is aligned with one of the slots 61 of thecore, as shown in Fig. 1.

The leg 62 is then positioned above a surface of the frame 5 byadjusting the radial position of arm 50 independently of the radialposition of winch 4|. For this purpose, nuts 51 are loosened, the arm ismoved radially until the leg 62 is positioned properly above the core,and the arm is locked in its position by tightening nuts 51 againstflange 58. The effective length of the leg 62 then is adjusted byturning the screw 63 until there is a small clearance between thesurface of frame 5 on which the leg is to stand and the foot 54 of theleg.

The hoist then is properly positioned for use with the iiling device 66for ling the slots of the The Y cylindrical laminated core 4. Before thefiling operation is begun, handwheel 38 is rotated to move the winch andthe leg radially inward until the alignment of cable 43 is broughtwithin the bore of the core. The filing device G6 may be attached to thecable, and the winch 4l operated to lower the ling device below the core4.

Handwheel 38 then is oppositely rotated to move the winch 4l and leg 62radially outward for realigning the cable 43 with the slot 61. Thefiling device being properly inserted in the slot, the winch isoperated, winding the cable 43 over pulley 49 and on the drum 42 anddrawing the device upward through the slot. This operation may berepeated if it is desired to again draw the filing device through thesame slot.

When the filing device is being drawn through a slot, the reaction ofthe core 4 to the filing device, transmitted through the cable 43, pullsdown on the winch and causes the foot 64 of leg 62 to be pressed firmlyagainst the frame 5. The clearance between the leg and the frame istaken up by the resiliency of the beams 1 and of the arm 5). The leg 52thus additionally supports the table 24. When the filing device is drawnclear of the slot, the resiliency of the structure causes the foot 54 tolift and again have clearance from the surface of the frame 5. Thereforethe radial position of the winch 4I, its pulley 49, and the leg 62, maybe adjusted without readjusting the length of the leg 62.

For filing another slot of the core 4, such as an adjacent slot, thewinch and leg are moved radially inward. Handwheel 22 then is rotated,revolving worm i9 and worm wheel i5. Shaft I4 being rigidly connected toworm wheel I5 and to table 24, rotates with the worm wheel and pivotstable 24 with it. The angular position of table 24 is so adjusted thatthe cable 43 is radially aligned with the slot to be led. The hoist thenmay be adjusted as described above preparatory to lowering the deviceout of the slot, and for realigning the lcable with the device when itis inserted in the slot.

Although but one embodiment oi the present invention has beenillustrated and described, it will be understood that changes andmodifications may be made therein without departing from the spirit ofthe invention or the scope of the appended claims.

It is claimed and desired to secure by Letters Patent:

l. A hoist comprising a fixed horizontal beam, a vertically pivotedtable supported on said beam, a power winch attached to said table, aleg connected to said winch for additionally supporting said winch, andmeans for adjusting the radial positions of said winch and said leg.

2. A hoist comprising a fixed horizontal beam, a vertically pivotedtable supported on said beam, a power winch attached to said table, aleg connected to said winch, common means for ad justing the radialpositions of said winch and said leg, and additional means for adjustingthe radial position of said leg independently of the position of saidwinch.

3. A hoist for operation above a fixed structure, said hoist comprisinga horizontal beam, means for supporting said beam at a fixed heightabove said structure, a vertically pivoted table supported on said beam,a winch mounted on said table at a fixed height above said structure, aleg extending downward from said winch for additionally supporting saidwinch on said structure, and means for adjusting the length of said legto conform to the height of said structure.

4. A hoist comprising a fixed horizontal beam, a vertically pivotedtable supported on said beam, a power winch attached to said table, aleg connected to said winch for additionally supporting said Winch,means for adjusting the length of said leg, and means for adjusting theradial positions of said Winch and said leg.

5. A hoist comprising a fixed horizontal beam,

a vertically pivoted table supported on said beam, l0

a power winch attached to said table, a leg connected to said winch,means for adjusting the length of said leg, common means for adjustingtheradial positions of said winch and said leg, and additional means foradjusting the radial position of said leg independently of the positionof said winch.

6. A hoist comprising a xed horizontal beam, a vertically pivoted tablesupported on said beam, a power winch attached to said table, a legconnected to said winch for additionally supporting 6 said winch, andmeans for adjusting the radial position of said leg to cause said leg toeffect its supporting action at an adjustable distance from the pivotalaxis of said table.

JOSEPH HAUK.

REFERENCES CITED The following references are of record in the le ofthis patent:

UNITED STATES PATENTS Number Name Date 112,829 Middleton Mar. 21, 1871679,840 Graham Aug. 6, 1901 734,187 Matthews July 21, 1903 1,314,257 FayAug. 26, 1919 1,564,133 Fraser Dec. 1, 1925 1,720,240 Saborsky July 9,1929 1,720,956 Heineke et al July 16, 1929 1,855,892 Schiebeler Apr. 26,1932 2,342,942 Johnston Feb. 2'9, 1944

